<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>VyKline</title>
  <style>
    * {
      padding: 0;
      margin: 0;
    }

    html,
    body {
      width: 100%;
      /* height: 100%; */
    }

    #chart_container {
      margin: 40px auto;
      width: 1000px;
      height: 450px;
    }

    fieldset {
      padding: 20px;
      width: 50%;
      margin: 0 auto;
    }
  </style>
</head>

<body>
  <div id="chart_container"></div>
</body>

</html>